I\'m still beginner in PHP. I have a small problem, I would to multiply the value get_formatted_order_total(); with 3.75 and what I did is
get_formatted_order_total();
get_form
Semi-colons go at the end of an instruction. Since this is all one instruction, you need to move the semi-colon to the end of the line:
echo get_formatted_order_total() * 3.75;
Example: http://codepad.org/HH3RLZCR